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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z



A B C D E F G H I J K L M N O P Q R S T U V W X Y Z






What is an Herbarium?

Genus Descriptions

Species Descriptions

Ontario FEC V-Types

Bibliography

Terminology

Who Collects the Plants?

Collector Biographies

Nomenclature Primer

Website Information

Northern Ontario Plant Database
 
Leaf Bases




Attenuate a tapering base with concave margins that form an angle less than (<) 45 degrees.
Narrowly cuneate a narrow base with straight or convex margins that form an angle less than (<) 45 degrees.
Truncate a broad straight base, abruptly ending at right angles to the midvein.
Oblique an asymmetrical base with unequal size lobes, attached to the midvein at different levels.



Cuneate a wedge-shaped base with margins that form an angle less than (<) 90 degrees, but greater than (>) 45 degrees.
Obtuse a blunt base with margins that form an angle greater than (>) 90 degrees.
Rounded a curved base with margins that form a smooth arc.
Cordate a base with prominent, rounded lobes, cut ? to ¼ of the distance to the centre of the leaf blade.



Auriculate a base with small rounded (ear-like) lobes.
Hastate a base with pointed lobes directed outwards.
Sagittate a base with pointed lobes directed downwards.
Divergent a base with short, straight-sided lobes directed outward.

 
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